The preparation mannered null Fe 3+ , the Al 3+

摘要

PROBLEM TO BE SOLVED: To provide a method for preparation of dinitroamic acid and its salt, wherein the method is friendly to environment.;SOLUTION: The dinitroamic acid is obtained by nitrating sulfamic acid ammonium with a fuming nitric acid as a nitration agent using a solid acid catalyst selected from the group consisting of montmorillonite clay catalyst, metallic ion-exchanged K10 montmorillonite clay catalyst, and a surface support catalyst. The dinitroamide ammonium is prepared by neutralizing the dinitroamic acid with ammonia, and separating the dinitroamide ammonium with a conventional treatment method.;COPYRIGHT: (C)2003,JPO